cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A180963 Numbers divisible by 3 with an odd number of 1s in their base 2 representation.

Table of values

n a(n)
1 21
2 42
3 69
4 81
5 84
6 87
7 93
8 117
9 138
10 162
11 168
12 171
13 174
14 186
15 213
16 234
17 261
18 273
19 276
20 279
21 285
22 309
23 321
24 324
25 327
26 333
27 336
28 339
29 342
30 345
31 348
32 351
33 357
34 369
35 372
36 375
37 381
38 405
39 426
40 453
41 465
42 468
43 471
44 477
45 501
46 522
47 546
48 552
49 555
50 558
51 570
52 597
53 618

List of values

[21, 42, 69, 81, 84, 87, 93, 117, 138, 162, 168, 171, 174, 186, 213, 234, 261, 273, 276, 279, 285, 309, 321, 324, 327, 333, 336, 339, 342, 345, 348, 351, 357, 369, 372, 375, 381, 405, 426, 453, 465, 468, 471, 477, 501, 522, 546, 552, 555, 558, 570, 597, 618]